Hole cleaner



June 21, 1932.

L. L. VRICAZHARDSQN HOLE CLEANER Filed O Gt. 24. 1928 2 Sheets-Sheet 1INVENTOR ED L R/cb/A FP50/v 4f M A oRNEYs June 2l, 1932. 1 l..RICHARDSON 1,864,148

HOLE CLEANER lFilecl Oct. 24. 1,928 2 Sheets-Sheet 2 2 on N w INVENTORED L Plc/m kso/v B M4540@ AT ORNEY5 Patented June 21, 1932 UNITED STATESOFFIC LED L. RICHARDSON, OF CLEVELAND, OHIO, ASSIGNOR TO THE CLEVELANDROCK DRlLL COMPANY, F CLEVELAND, OHIO HOLE CLEANER Application meaoctober 24,1923. serial No. 314,780.

The present invention is directed to improvements in hole cleaners foruse in connection with percussive drills.

The primary object of the invention is to provide a device of thischaracter constructed and arranged in such manner that the fluidcontrolling valve can be held in a position to permit pressure iuidunder line pressure to pass through the drill and drill steel to blowthe cuttings from the drill hole.

Another object of the invention is to provide a device of this characterwhich is simple in construction, and which can be convenientlycontrolled by the drill runner.

The above and other objects and advantages of my 'improvement will fullyappear from the following description with the accompanying drawings andbe explicitly, defined in the appended claims. It will be understood,however, that this disclosure is illustrative only, and that theprinciple of the invention can be embodied in construction other thanthe one speciied herein.

In the accompanying drawings Figure 1 is a. sectional diagrammatic viewshowing the vparts in their normal working position.

Figure 2 is a similar view, showing the position of the parts during theblowing opera- 131011.

Referring to the drawings, 1 designates the cylinder in which isreciprocable the piston hammer 2 having a fluted extension 2 forrotating the chuck 3, and thus the drill steel 4 therein, rotarymovement being imparted to the hammer by the rie bar 5 and ratchetmechanism 6. The construction thus described is conventional, and noclaim is made therefore specifically.

Associated with the cylinder is a valve chest 7 in which is provided achamber 8, said chamber having fitted in its ends plugs 9 and 10, thelatter having a stem 11 which extends to and through the plug 9 and uponthis stem is slidable the sleeve 12 of the valve 13. The valve 13includes a central flange 14 and spaced terminal flanges 15. Surroundingthe plugs 9 and 10 are end chambers 16 and 17, respectively, the formeropening to atmos- 50 phere through the duct 18. Motive fluid isintroduced to the valve chamber 8 through the supply port 19 which opensinto annular groove 20, there being upon opposite sides of this grooveannular channels 21 and 22, which have communicating therewith,respectively, thev main fluid vdistributing passages 23 and 24, whichopen into the front and rear ends of the hammer chamber 25.,respectively.

The walls of the chamber 8 has formed E,

therein' annular exhaust channels 26 which are open to atmospherethrough the ports 27. The end chambers 16 and 17 Vare in communicationwith the hammer chamber 25 through the crossed kick 0E ports 28 and 29,respecbersv 31 vand 32 dened bythe inner ends of' the'plugs 9 and y10and adjacent ends ofthe sleeve 12. The construction and operation of thevalve isthe same as that disclosed in the handle and thus the shank inselected positions. The shank has formed in its in-l nerlend relatively.short angularly disposed communicating ports 38 and `39, and a diagf fr;

onally disposed passage 40, which when in the position as shown inFigure 1 places thev duct 41 and port 42 in communication in order-thatresidue air in the chamber 17 canV i pass therefrom to atmosphere, aslit doesv through the duct 18, upon reversal of the.

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Briefly the operation is as follows:

The passage 40 is in communication with the duct 41 and port 42 in orderthat the residue air will exhaust from the chamber -17 and when theparts are in this position Y the valve 13 is free to reciprocate, underthe action of motive fluid admitted alternately into end chambers 16 and17 from the cylinder by way of the crossed kick off ports'28 and 29respectively, to control the distribution of pressure fluid to thehammer chamber to actuate the piston hammer, and in the same manner asdisclosed in the patent -re ferred to. After a period of drilling it isY found desirable to blovxT 'the cuttings from the hole, the valve 34 isrotated a quarter turn, thus rotating the shank 35 thereof, whereuponthe passage 40 is moved: out of registration with the duct 41 and port42 rto I permit the escape of air from the chamber 17, and at which timethe piston hammer closes -the passage 29 to prevent leakage of air Vfromthe chamber 17. Live air from the supply port 19 will enter the orifice30 into the chamber 32 and acts upon one end of the sleeve12. Thechamber 17 will be supplied .withlive' air from chamber 32throughpassage`33, ports 38 and 39, and passage 43. The live air in thechambers 32 and 17 will overcome the pressure of the live air reachingchamber 16 through thel port 28, thereby holding the valve in thepositionshown in Figure 2. The major quantity yof air from the line`will enter the chamber 25 through the passage 24 driving the pistonforwardly and from thence past the rifle bar 5, through the bore 44 ofthe hammer extension into the bore 45 of the drill steel. The airflowing thus, ,under linepressure w-illobviously blow Lthe 4 cuttingTAfrom the hole being drilled.

" After the hole has been blown, the valve 34 audits shank are'turnedreversely in order thatthe parts will again be positioned'to permit freemovement of the valve and reciprol cation of the piston hammer.

`What is claimed 'is .y Y

The combination with a cylinder having a piston hammer reciprocabletherein, of a valve chest communicating with a source of motive fluid, astem in the chest, a valve slidable on the stem foreffecting the supplyand exhaustof the motive fluid to and from the cylinder, said chesthaving-chambers at the opposite ends 0fy saidkvalve communicating Y with.the opposite ends of said cylinder to e'ect reciprocation of saidvalve, a valve shank rotatably associated with said stem, said valveshank Aand said stem having cooperating ports arranged in one positionof Y, said valve Ashank to conduct motive fluid through the stem to voneof said chambers to actagainst the end of the valveY and hold the sameinactive.

In testimony whereof I-affiX my signature.

LED L. RICHARDSON.

